How much power needed to run 8.60 in a 105" nostalgia type Altered?

[ChevJerico]

I'm in the early stages of deciding if it's feasible or not.  Thinking of stepping up, and purchasing a roller, and build my own 392 Hemi.  Trying to get an idea of cost with the Hemi.  Would like it to be blown on gas or methanol for the look, but that would probably be too much power for 8.60

[THE FRENCHTOWN FLYER]

The 105" w.b. is relatively inconsequential. Some 100" AA/FAs run in the sixes. What is needed is the total weight of the car and driver to give you a fairly accurate idea of how much power you will need at the rear wheels. Add about 10% for a well engineered drivetrain and that will be your crankshaft HP.

[ChevJerico]

The 105" w.b. is relatively inconsequential. Some 100" AA/FAs run in the sixes. What is needed is the total weight of the car and driver to give you a fairly accurate idea of how much power you will need at the rear wheels. Add about 10% for a well engineered drivetrain and that will be your crankshaft HP.

Oh hey thanks, Guess I kind of worded that wrong.  I'm looking for a nostalgia Altered, but I know it's a matter of weight.  I'm not sure how much a 105" Altered weighs?  Assuming drivetrain loss and a little extra horsepower.   I'm guessing about 1750 car and driver equals about 600 horsepower.  Does that sound right?  Just trying to get a rough idea with a little extra power just in case.

[dreracecar]

weight divided ET3 ( et x et x et) X 197.14

 So if the car weighs   1750# / 636 ( 8.60 ET3)  =  2.75
 2.75 x 197.14  =  542 HP

[ChevJerico]

weight divided ET3 ( et x et x et) X 197.14

 So if the car weighs   1750# / 636 ( 8.60 ET3)  =  2.75
 2.75 x 197.14  =  542 HP

Hey thanks, gives me an idea of what engine and how much it will cost.  Was dreaming about a 392 Hemi, but might have to settle for the run of the mill BBC,SBC.

[jeff/21]

why are you settling? is it because of cost, we all have budgets yes Chev's are the cheapest and easiest to get parts for and 600hp isn't that hard to achieve sometime it's best to put dreams aside  and finish the project.

[ChevJerico]

why are you settling? is it because of cost, we all have budgets yes Chev's are the cheapest and easiest to get parts for and 600hp isn't that hard to achieve sometime it's best to put dreams aside  and finish the project.

Yea, plus I have a couple other projects I need to finish

Just trying to get a cost idea to run NE2, think I have a good idea now.  Thanks everyone for your input.

[fuel749]

We run a 105" Altered at 1600 pounds with a stack injected 355 sbc.  Best of 8.79 in great weather.  Runs 8.90 like clockwork year round, we slow it down a bit to run the 9.0 class at our local track.   Shouldn't be much of a trick to build a 392 to run 8.60's. 

[ChevJerico]

We run a 105" Altered at 1600 pounds with a stack injected 355 sbc.  Best of 8.79 in great weather.  Runs 8.90 like clockwork year round, we slow it down a bit to run the 9.0 class at our local track.   Shouldn't be much of a trick to build a 392 to run 8.60's.

Thanks fuel749,  I'll run my Chevelle, while I build a low buck altered.  Never thought I'd step up, but I think I can do a hemi on a budget since I do my own work.

[Rat]

Even at 1800# a fairly mild methanol stack injected 392 with cast heads should make enough power to run 8.60
Currently helping out building a 392 now to go into a FED should be on track in a few months

[ChevJerico]

Even at 1800# a fairly mild methanol stack injected 392 with cast heads should make enough power to run 8.60
Currently helping out building a 392 now to go into a FED should be on track in a few months

That's what I was hoping to hear

[THE FRENCHTOWN FLYER]

weight divided ET3 ( et x et x et) X 197.14

 So if the car weighs   1750# / 636 ( 8.60 ET3)  =  2.75
 2.75 x 197.14  =  542 HP

I believe that would be the HP delivered at the rear wheels. So if you add 10% for the drivetrain losses - say, 55 HP - you get around 600 HP at the crankshaft, as you surmised.

As a frame of reference my 1800# six cylinder S/Pro (car and driver) has gone 9.00@147 (5.60 eighth) and puts 487 HP to the ground, or about 540 HP at the crank.

[ChevJerico]

weight divided ET3 ( et x et x et) X 197.14

 So if the car weighs   1750# / 636 ( 8.60 ET3)  =  2.75
 2.75 x 197.14  =  542 HP

I believe that would be the HP delivered at the rear wheels. So if you add 10% for the drivetrain losses - say, 55 HP - you get around 600 HP at the crankshaft, as you surmised.

As a frame of reference my 1800# six cylinder S/Pro (car and driver) has gone 9.00@147 (5.60 eighth) and puts 487 HP to the ground, or about 540 HP at the crank.

Thanks FF, nice to have some real world numbers!

[JrFuel Hayden]

Here is some info on another combination, one of the egines we run in our all iron early 310 ci [ limit at time it was built] pure alky burning Hemi racing in NHRA Heritage JrFuel , we chose the 354 block, because Gene Adams said it is stronger, and 331 heads, because it's alittle lighter, and the port shapes are good for OEM head , plus you don't have to weld up the heat riser in the head. we use a block filler to help make the block stronger , TI valves and Rocker Arm Specialties 1.8 ratio on the intakes, for one reason because the Hemi has a limit on cam size so we make it up on ratio, custom billet piston, because burning alky works better with as high compression as possible , not too common since so many Hemis are super charged, but JF rules are stack injectors. On a dyno we made 873hp and in our 225 wb dragster with Power Glide with a 7" converter stall at 8300, and shifting at 91-9200 in our 1485 lb car with driver. OH ya the slick limit is 12" on 12" wide rims. We won a JF Championship with this combo running the best at 7.02@187 mph.   
I know this not what you are looking for, but I thought I'd give you something to think about.
Come to the March Meet and watch us run the Hemi
Call if you want more info 805-444-4489, cell

[ChevJerico]

Here is some info on another combination, one of the egines we run in our all iron early 310 ci [ limit at time it was built] pure alky burning Hemi racing in NHRA Heritage JrFuel , we chose the 354 block, because Gene Adams said it is stronger, and 331 heads, because it's alittle lighter, and the port shapes are good for OEM head , plus you don't have to weld up the heat riser in the head. we use a block filler to help make the block stronger , TI valves and Rocker Arm Specialties 1.8 ratio on the intakes, for one reason because the Hemi has a limit on cam size so we make it up on ratio, custom billet piston, because burning alky works better with as high compression as possible , not too common since so many Hemis are super charged, but JF rules are stack injectors. On a dyno we made 873hp and in our 225 wb dragster with Power Glide with a 7" converter stall at 8300, and shifting at 91-9200 in our 1485 lb car with driver. OH ya the slick limit is 12" on 12" wide rims. We won a JF Championship with this combo running the best at 7.02@187 mph.   
I know this not what you are looking for, but I thought I'd give you something to think about.
Come to the March Meet and watch us run the Hemi
Call if you want more info 805-444-4489, cell

Hey Jon, man that's some crazy power out of that small mill at 9200 .  I need to pay a little more attention to JF.  I didn't know you guys were running all iron combinations. I remember mention of heads by the announcer a few years back.  I've probably seen you guys run a couple times.  We are going to miss the MM this year, but will make the CHRR.  We are going to Florida to find a place to live, and see if we like it.  We will be taking my older brother to the Gatornationals.  Big Daddy is going to be there, so we are excited about that.  We toured Big's museum last September.  Plus we are going to hit up the NMCA street machine nationals at Bradenton.  The hardest part for me and leaving California would be leaving the Nostalgia scene, but we will fly out for the MM, and CHHR.  Could be a year or two before we make the move.